Boss Audio MCBK634B.64 Marine Stereo Kit with MR634UAB Bluetooth Receiver, 4 MR6B 6.5 Inch Speakers and Antenna

The MCBK634B.64 is a four-speaker marine package built around the Boss Audio MR634UAB single-DIN receiver, joined by two pairs of MR6B 6.5-inch full-range speakers, a black MRANT10 antenna and a matching black wireless remote. The receiver has no CD or DVD drive; instead it handles Bluetooth calling and audio streaming, USB, SD, auxiliary input and AM/FM radio, and it plays MP3 and WMA files. Streaming apps such as Spotify and Pandora can be controlled wirelessly from a phone.

For marine durability, the head unit uses a conformal-coated circuit board and a UV-protected, detachable faceplate, and its tuner can switch between US and EU frequency spacing. Each MR6B speaker combines a dual polypropylene cone design with a composite basket. Front and rear pre-amp outputs are provided for future system expansion, and a 1 A USB port can top up a phone.

• Receiver: 50 W x 4 max, built-in EQ presets, push-to-talk
• Sources: Bluetooth, USB, SD, aux input, AM/FM; MP3 and WMA playback
• USB charging at 1 A plus front and rear pre-amp outputs
• Speakers: 4 ohm nominal, 180 W max, 86 dB sensitivity (1 W/1 m)
• Speaker frequency response: 85 Hz to 20 kHz (plus or minus 3 dB)
• Speaker size: 7.5 in. overall diameter, 5.47 in. cutout, 2.24 in. mounting depth
• Includes MR634UAB receiver, four MR6B speakers, MRANT10 antenna and wireless remote